Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Journal of Porous Media

Impact factor: 1.035

ISSN Print: 1091-028X
ISSN Online: 1934-0508

Volumes:
Volume 19, 2016 Volume 18, 2015 Volume 17, 2014 Volume 16, 2013 Volume 15, 2012 Volume 14, 2011 Volume 13, 2010 Volume 12, 2009 Volume 11, 2008 Volume 10, 2007 Volume 9, 2006 Volume 8, 2005 Volume 7, 2004 Volume 6, 2003 Volume 5, 2002 Volume 4, 2001 Volume 3, 2000 Volume 2, 1999 Volume 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v11.i1.50
pages 73-83

Unsteady Natural Convection inside a Porous Enclosure Heated from the Side

Loay Younis Aldabbagh
Eastern Mediterranean University,
Hamed Farahani Manesh
Department of Mechanical Engineering, Eastern Mediterranean University G. Magosa, North Cyprus, Via Mersin 10, Turkey

ABSTRACT

Experiments were conducted to study transient natural convection in a porous medium filling a differentially heated enclosure. Four porous media are considered consisting of spherical beads of diameter 0.2, 0.4, 0.6, and 0.8 cm. The aspect ratio of the enclosure, A = H/L, is 0.67. The investigations were carried out for Darcy-modified Rayleigh numbers between 285 and 9 × 104. The results indicate that heat transfer increases with increasing Darcy number, Da, for the same Rayleigh number. The time needed for heat wave propagation through the porous medium from the hot isothermal wall to reach a steady state is reduced with increasing Darcy number and/or by increasing the Darcy-modified Rayleigh number for the same Da. The variation of Nusselt number and the Darcy-modified Rayleigh number with time has also been investigated experimentally.